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Add config flag for reborrows in explicit_iter_loop

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This commit adds a config flag for enforcing explicit into iter lint
for reborrowed values. The config flag, enforce_iter_loop_reborrow, can be
added to clippy.toml files to enable the linting behaviour. By default
the lint is not enabled.
This commit is contained in:
Ben Schofield 2023-08-27 21:45:14 -06:00
parent 8c20739e4d
commit be55a96d80
8 changed files with 68 additions and 56 deletions
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7
tests/ui/explicit_iter_loop.fixed
View file

@ -4,6 +4,7 @@
clippy::similar_names,
clippy::needless_borrow,
clippy::deref_addrof,
clippy::unnecessary_mut_passed,
dead_code
)]
@ -20,15 +21,15 @@ fn main() {
for _ in rvec {}
let rmvec = &mut vec;
for _ in &*rmvec {}
for _ in &mut *rmvec {}
for _ in rmvec.iter() {}
for _ in rmvec.iter_mut() {}
for _ in &vec {} // these are fine
for _ in &mut vec {} // these are fine
for _ in &[1, 2, 3] {}
for _ in &*(&mut [1, 2, 3]) {}
for _ in (&mut [1, 2, 3]).iter() {}
for _ in &[0; 32] {}
for _ in &[0; 33] {}

1
tests/ui/explicit_iter_loop.rs
View file

@ -4,6 +4,7 @@
clippy::similar_names,
clippy::needless_borrow,
clippy::deref_addrof,
clippy::unnecessary_mut_passed,
dead_code
)]

64
tests/ui/explicit_iter_loop.stderr
View file

@ -1,5 +1,5 @@
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:16:14
--> $DIR/explicit_iter_loop.rs:17:14
|
LL | for _ in vec.iter() {}
| ^^^^^^^^^^ help: to write this more concisely, try: `&vec`
@ -11,132 +11,106 @@ LL | #![deny(clippy::explicit_iter_loop)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:17:14
--> $DIR/explicit_iter_loop.rs:18:14
|
LL | for _ in vec.iter_mut() {}
| ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&mut vec`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:20:14
--> $DIR/explicit_iter_loop.rs:21:14
|
LL | for _ in rvec.iter() {}
| ^^^^^^^^^^^ help: to write this more concisely, try: `rvec`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:23:14
|
LL | for _ in rmvec.iter() {}
| ^^^^^^^^^^^^ help: to write this more concisely, try: `&*rmvec`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:24:14
|
LL | for _ in rmvec.iter_mut() {}
| ^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&mut *rmvec`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:29:14
--> $DIR/explicit_iter_loop.rs:30:14
|
LL | for _ in [1, 2, 3].iter() {}
| ^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[1, 2, 3]`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:31:14
|
LL | for _ in (&mut [1, 2, 3]).iter() {}
| ^^^^^^^^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&*(&mut [1, 2, 3])`
error: the method `iter` doesn't need a mutable reference
--> $DIR/explicit_iter_loop.rs:31:14
|
LL | for _ in (&mut [1, 2, 3]).iter() {}
| ^^^^^^^^^^^^^^^^
|
= note: `-D clippy::unnecessary-mut-passed` implied by `-D warnings`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:33:14
--> $DIR/explicit_iter_loop.rs:34:14
|
LL | for _ in [0; 32].iter() {}
| ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[0; 32]`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:34:14
--> $DIR/explicit_iter_loop.rs:35:14
|
LL | for _ in [0; 33].iter() {}
| ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[0; 33]`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:37:14
--> $DIR/explicit_iter_loop.rs:38:14
|
LL | for _ in ll.iter() {}
| ^^^^^^^^^ help: to write this more concisely, try: `&ll`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:39:14
--> $DIR/explicit_iter_loop.rs:40:14
|
LL | for _ in rll.iter() {}
| ^^^^^^^^^^ help: to write this more concisely, try: `rll`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:42:14
--> $DIR/explicit_iter_loop.rs:43:14
|
LL | for _ in vd.iter() {}
| ^^^^^^^^^ help: to write this more concisely, try: `&vd`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:44:14
--> $DIR/explicit_iter_loop.rs:45:14
|
LL | for _ in rvd.iter() {}
| ^^^^^^^^^^ help: to write this more concisely, try: `rvd`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:47:14
--> $DIR/explicit_iter_loop.rs:48:14
|
LL | for _ in bh.iter() {}
| ^^^^^^^^^ help: to write this more concisely, try: `&bh`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:50:14
--> $DIR/explicit_iter_loop.rs:51:14
|
LL | for _ in hm.iter() {}
| ^^^^^^^^^ help: to write this more concisely, try: `&hm`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:53:14
--> $DIR/explicit_iter_loop.rs:54:14
|
LL | for _ in bt.iter() {}
| ^^^^^^^^^ help: to write this more concisely, try: `&bt`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:56:14
--> $DIR/explicit_iter_loop.rs:57:14
|
LL | for _ in hs.iter() {}
| ^^^^^^^^^ help: to write this more concisely, try: `&hs`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:59:14
--> $DIR/explicit_iter_loop.rs:60:14
|
LL | for _ in bs.iter() {}
| ^^^^^^^^^ help: to write this more concisely, try: `&bs`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:148:14
--> $DIR/explicit_iter_loop.rs:149:14
|
LL | for _ in x.iter() {}
| ^^^^^^^^ help: to write this more concisely, try: `&x`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:149:14
--> $DIR/explicit_iter_loop.rs:150:14
|
LL | for _ in x.iter_mut() {}
| ^^^^^^^^^^^^ help: to write this more concisely, try: `&mut x`
error: it is more concise to loop over references to containers instead of using explicit iteration methods
--> $DIR/explicit_iter_loop.rs:152:14
--> $DIR/explicit_iter_loop.rs:153:14
|
LL | for _ in r.iter() {}
| ^^^^^^^^ help: to write this more concisely, try: `r`
error: aborting due to 22 previous errors
error: aborting due to 18 previous errors